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� � s ' LITHOLOGIC LOG BORING No. STK-3 Logged By:Jennifer Guide Date Started:10/9/07 Client:PG&E ' Checked By:Rick McCartney Date Completed:10/9/07 Site:Stockton A Substation Driller:Precision Sampling/Ernesto Northing:- Location:Stockton,California Drilling Method:Hand Auger(0-5 ft)/Direct Push(5 ft-Total Depth) Easting:- Project No.:PGE-1035-400 Sampling Method:Hand Auger Bucket/2"x 5'core barrel Elevation:- ' Sampling Interval:Continuous Boring Depth: 10 Feet Page: 1 of 1 r E «a a 0 c p _1 - m DESCRIPTION ,X Sample I.D. o o u V w E to y 6 E o `m O @ W ami of ' o •••°°° GWA99re ate Base 6") 9 STK-a-o.s 0I sum __ SILTY SAND,dark yellowish brown to dark brown,dry,medium _ dense,fine-grained sand,no odor. CL Sample STK-3-0.5 collected from 0.5-0.75 feet bgs_ 1 ------------- ----------------------------------------- ------ - -- --' - -- - - -" SANDY CLAY,dark yellowish brown to dark brown,slightly moist, za medium stiff,medium plasticity,fine-grained sand,some silt-very ML �°,slight petroleum odor. ' SANDY SILT-dusky yellowish brown,slightly moist,soft,no 3 _ plasticity,fine-grained sand,no odor. / CL Lean CLAY,grayish brown,slightly moist,stiff,medium plasticity, / trace to some fine-grained sand,slight petroleum odor. ' 4 z At 4 feet,becomes less plastic. Sample STK-3-5.0 collected from 5-5.25 feet bgs. STK-35.0 _ 1 j At 5 feet,becomes dark yellowish brown,medium stiff,very slight petroleum odor. 6 /i At 7 feet,some fine-grained sand,no plasticity,no odor. At 8 feet,becomes slightly plastic(low plasticity). s 1 j/ At 9 feet,becomes moderate yellowish brown,stiff. ' STK-3-9.5 1 Sample STK-3-9.5 collected from 9.5-10 feet bgs. to- 12- 14- Notes: o 1214Notes:Boring completed to 10 feet bgs.Groundwater was not encountered.Borehole backfilled with neat cement from total depth to TERRA PACIFIC GROUP surface.Surface repaired to match surroundings. ' Environmental Engineering,Consulting,and Construction